diff --git a/assets/css/main.css b/assets/css/main.css
index d7fc143..2b3a6a3 100644
--- a/assets/css/main.css
+++ b/assets/css/main.css
@@ -125,7 +125,7 @@ input, select, textarea {
 	}
 
 	p {
-		margin: 0 0 2em 0;
+		margin: 0 0 0.5em 0;
 	}
 
 	h1, h2, h3, h4, h5, h6 {
diff --git a/index.html b/index.html
index 6510838..0b8f7d2 100644
--- a/index.html
+++ b/index.html
@@ -61,7 +61,8 @@
 						<section>
 							<h2>Object Identifier</h2>
 							<p>Object Identifier (OID) is an identifier mechanism standardized by the International Telecommunication Union (ITU) and ISO/IEC for naming any object, concept, or "thing" with a globally unambiguous persistent name.</p>
-							<p>I have been assigned the OID arc <b>1.3.6.1.4.1.63420</b> by the Internet Assigned Numbers Authority (IANA).</p>
+							<p>The Internet Assigned Numbers Authority (IANA) has assigned the OID arc <b>1.3.6.1.4.1.63420</b> to me.</p>
+							<p>The assignment of the OID arc is hereby acknowledged in this PDF document:</p>
 							<ul class="actions">
 								<li><a href="https://repo.zhanganjun.com/OID/OID_Assignment_v1_0.pdf" class="button icon solid fa-download">OID Assignment PDF</a></li>
 							</ul>